# Problems tagging .m4b files

**URL:** https://community.mp3tag.de/t/problems-tagging-m4b-files/15904
**Category:** Support
**Created:** [July 11, 2014, 11:16pm UTC](https://community.mp3tag.de/t/problems-tagging-m4b-files/15904 "2014-07-11T23:16:46Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![bd59903](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/b/848f3c/32.png) [@bd59903](https://community.mp3tag.de/u/bd59903)
#### Post date: [July 11, 2014, 11:16pm UTC](https://community.mp3tag.de/t/problems-tagging-m4b-files/15904/1 "2014-07-11T23:16:46Z")

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I have searched but cant find an answer to this.  
I have been having problems with tagging m4b and maybe m4a files  
the largest and first problem i run into is with auto numbering  
it will sometime only tag some of the files (with their correct #) while at other files none are tagged.  
 ![](http://i58.tinypic.com/w15krd.jpg)  
I have tried removing all tags and starting over, tried playing around with mpeg option settings  
not just auto numbering either  
have tried changing the track in the sidebar and saving, nothing  
have to change it in explorer properties for it to work and then it does not even show up in mp3tag  
not just those files either, happens with a lot of different files.  
any ideas?

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